Antoine Cezar 5973ab47b9 commands: move rebase_to_dest_parent to jj_lib::rewrite
What make rebase_to_dest_parent a good candidate for jj_lib::rewrite module:

- It is used both in obslog and interdiff. It's a sign that it may be moved to a lower layer
- CommandError is returned by converting from TreeMergeError. Not explicitly.
- It only use jj_lib::rewrite fonctions.
2023-11-03 20:48:00 +01:00
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